Even my older FX 8320e CPUs manage more like 50 cents/day on Monero (they're pretty close on hashrate to the octo-core Ryzen parts due to similar clock and cache size).

Any AM3+ motherboard supports DDR3.

 Most of my rigs use the ASRock 970 Extreme 4 (which supports up to 5 cards using risers for 2 or more of them), but availability has been getting spotty on those of late.

 The ASUS and Biostar mining motherboards have good reps, but finding low-cost CPUs to put in them is getting to be a problem as Socket 1150 CPUs have been out of production for a while now.
 To be fair, AMD seems to have shut down production of most of their FX series CPUs as well but the supply "in the channel" is still pretty good.

freq at 850 is probably causing you a LOT of hardware errors.
 Those miners were "stock" at 700 but THAT was already a fairly hefty overclock, and tended to overstress the power delivery system.

EVGA normally uses good dual ball bearing fans in their cards, so they SHOULD last a long time even at 100%.

 On the other hand, pushing them that hard to keep the card under 60C is overkill - card should last quite a few years at 70C, and your fans will last a LOT longer at 80% or less of max.

 Why do you ASSUME that the "big boys" only do GPU mining?

 It's a viable Monero miner, should pull about 250 hash/sec

 Not sure if it's worth trying to mine anything else offhand.

 As opposed to the Sapphire "mining cards" which appear to be standard Nitro parts with the video circuitry and connectors removed (except for one DVI connector on SOME models), and the mounting bracket changed.

 Mine even still have the "Nitro" stickers on the fans....

If it uses a reference board design, try flashing it with a undervolt BIOS from TheStilt.

 

 This should be in the altcoin section.

This should go to the Altcoin section, GPUs have been worthless for Bitcoin mining for YEARS.

 PVC has limited heat tolerance, which is why it's limited to use on COLD water distribution.
 CPVC had much higher heat tolerance, it's rated to handle hot water - but it might STILL be marginal at the temps that come out of most miners today.

 4000 CFM is severe overkill for 5 Avalon 741 units - something in the 1000-1500 CFM range would be PLENTY, unless you plan to add a LOT MORE MINERS to that space.

https://canaan.io/official-distributors/

 Seems definitive.

 Minerwarez should fix their site to say "an official Caanan distributor" not "the official Caanan distributor" though.

 That's the POOL status, not one individual farm.

 No, they were released AFTER the 15.12 drivers were.

 I recommend the 16.9.2 WQHL driver for the RX 4xx series cards, it also works reasonable well with most older AMD cards (though there's a couple "holes" in it's support for older cards, noteably the Tahiti based cards like the R9 280x).


 Ignore the "blockchain" drivers if you are on Windows 7 - they flat out DON'T WORK on older cards in my limited testing of them.
 Seems like AMD ONLY tested them on Windows 10 for some STUPID reason.

I've seen worse necros but not often - you DO realise you were replying to a post that was almost a YEAR OLD?

 Their site claims to be sold out - but that could be that they have it coded to say that when they have 0 inventory on hand.

 Splices tend to develop intermittant connections due to corruption over time.
 They are NOT "safer than code".
 I've spent way too much time REPLACING splce connections that FAILED AND CAUSED ISSUES to listen to your ignorance.

 Most of the current CODE dates from the 1960s and 1970s with substantial upgrades in every decade since then, not the "1900s".
 If you were an ELECTRICIAN you would understand that - and WHY the code is revised and updated with new and changed information every few years.

 BTW - GE doesn't sell all that much electrical distribution equipment, Schneider sells a LOT more especially since their buyout of Square D.
 GE is a lot bigger in "big unit" power GENERATION equipment like turbines (gas AND water) than in electrical distribution gear.

 The Government doesn't write the NEC, nor was The Government responsible for it's creation.
 In fact, most regulation on building and wiring is done at State or Local level (MOSTLY LOCAL by cities and counties), and they realized fairly quickly that it was easier cheaper AND PROMOTED BETTER SAFETY to adopt the NEC than it was to try to maintain their own ccodes individually.

 Expert at physics does NOT make you an expert at SAFE power distribution.


 Many or most electrical fires are caused by BAD CONNECTIONS, sometimes caused by splices that have corroded over the years, sometimes caused by wires getting frayed by wear (like when some utility companies don't "trim back" trees around their power lines on a frequent enough basis, or when someone lets their cat chew on power cords).
 Many more are caused by OVERLOADS - which is not the fault of the receptacle or the plug, nor is it the fault of the plug when the wiring at the plug gets frayed by misuse or abuse.

 780 sol/s more or less with my Aorus set to 105 % power limit (250 factory default TDP), +150 core, +100 memory - occasional peaks a hair over 790 but the average was closer to 780.

 Higher or lower memory settings LOWERED the hashrate (I noticed the higher settings were causing the core clock to DROP a little in Afterburner monitoring, and that appears to have been hurting hashrate).

 Serious code violation, and DANGEROUS.

 Not a real good idea even if you KNOW what you are doing.

 There is a REASON the NEC is very much ANTI-SPLICE and has been so for a while - as I recall even the old-style "wire nut splice" method is depreciated for new construction in recent versions of the Code, and it's never been considered a "best practice".


 Keep in mind that the NEC came about to prevent FIRES, and who is behind it.

 Try setting it for 1 thread per 2 MB of cache, that seems to be the sweet spot for XMR mining on CPUs.


 To an earlier question - I try to keep my GPUs to 70C or less when the ambient is in the 80F range.
 I plan some "rework" of my cooling setup in the current place over the winter to get more airflow through it, and intend to add a 3'd evap unit as well (currently running a pair of Brisa 3004 models "stacked" and have enough room and the proper electrical setup to "stack" a 3'd unit on top of the existing 2).

 Most (possibly all) current ASIC miner models have a 200-250 CFM cooling setup. The ones that use 2 fans in a "push-pull" setup do so to deal with high backpressure, doing that improves airflow SOME but is still only going to max out at the airflow rating of the HIGHEST airflow fan.